Malicious PDF — malware analysis report

Static analysis result for SHA-256 2466fc338d26237f…

MALICIOUS

PDF

75.4 KB Created: 2020-12-18 07:25:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3a7bc44de3a5883c42a6ae8c216f5a95 SHA-1: d92b9d6c1ae2882a4df8150a46e5bc424f8a6cd2 SHA-256: 2466fc338d26237f6254ea83e7dede2a935898341430cf90edf23d3a5ccb8eea
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffine.ru/strik?utm_term=the+wife%2527s+lament+translated+by+ann+stanford PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454041/normal_5fc882dad64ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387046/normal_5f8dcfb10f9f6.pdfIn PDF document text
    • https://nelovemisero.weebly.com/uploads/1/3/4/3/134347795/ac0a30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420587/normal_5f9eb324780bf.pdfIn PDF document text
    • https://lavulujataj.weebly.com/uploads/1/3/4/5/134576306/sanixilibosup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393358/normal_5fa2b98991a05.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fc55f712e537a05ef26dfac/t/5fcd95c02fa8bc6bcd03a96a/1607308736784/zatojajasadobowitulakexaz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc575d0b8467722f1f2951c/t/5fc904bc384989346244a091/1607009468706/rank_of_matrix_example_ppt.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf59153570fb44d1f9dadd/1606375702032/81521970312.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc57b5ca5bc066edfc4833b/t/5fc7a5c32ac13f1ee9c20b69/1606919619860/tap_tap_fish_halloween_tank.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28402be9b69395115071f/t/5fce503783d2ac65cc439212/1607356472578/laxunatufekuwituxapimafaw.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A3 5252 bytes
SHA-256: 68d747ff40ca4d1ee77229c7c49d1438152b762e57508c9bfeb06d03bce4a2f7
font_01_sfnt_off0000eb67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB67 12640 bytes
SHA-256: a54d9a73f033abf7867c9004b5823350523746f7a9b5284a1327838711a6be6c
font_02_sfnt_off000112eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112EB 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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